1. How to Recycle DifferentHow to Recycle Different
Types of PlasticTypes of Plastic
Dear EarthTalk: What is the deal with plastics recycling
these days? Can you explain what the different numbers
molded onto the bottom of plastic containers stand for?
– Tom Croarkin, Fairfield, CT
The confusion over what we can and cannot recycle
continues to confound consumers. Plastics are especially
troublesome, as different types of plastic require
different processing to be reformulated and re-used as
raw material. Some municipalities accept all types of
plastic for recycling, while others only accept jugs,
containers and bottles with certain numbers stamped on
their bottoms.
Integrantes: Virginia Crer
– Valeria Stengel –
Macarena Ortiz

2. Recycling by the Numbers
The symbol code we’re familiar with—a single digit ranging
from 1 to 7 and surrounded by a triangle of arrows—was
designed by The Society of the Plastics Industry (SPI) in 1988
to allow consumers and recyclers to differentiate types of
plastics while providing a uniform coding system for
manufacturers.
The numbers, which 39 U.S. states now require to be molded
or imprinted on all eight-ounce to five-gallon containers that
can accept the half-inch minimum-size symbol, identify the
type of plastic. According to the American Plastics Council,
an industry trade group, the symbols also help recyclers do
their jobs more effectively.

3. Easy Plastics to RecycleEasy Plastics to Recycle
The easiest and most common plastics to recycle areThe easiest and most common plastics to recycle are
made of polyethylene terephthalate (PETE) and aremade of polyethylene terephthalate (PETE) and are
assigned the number 1. Examples include soda andassigned the number 1. Examples include soda and
water bottles, medicine containers, and many otherwater bottles, medicine containers, and many other
common consumer product containers. Once it has beencommon consumer product containers. Once it has been
processed by a recycling facility, PETE can becomeprocessed by a recycling facility, PETE can become
fiberfill for winter coats, sleeping bags and life jackets.fiberfill for winter coats, sleeping bags and life jackets.
It can also be used to make bean bags, rope, carIt can also be used to make bean bags, rope, car
bumpers, tennis ball felt, combs, cassette tapes, sailsbumpers, tennis ball felt, combs, cassette tapes, sails
for boats, furniture and, of course, other plastic bottles.for boats, furniture and, of course, other plastic bottles.
Number 2 is reserved for high-density polyethyleneNumber 2 is reserved for high-density polyethylene
plastics. These include heavier containers that holdplastics. These include heavier containers that hold
laundry detergents and bleaches as well as milk,laundry detergents and bleaches as well as milk,
shampoo and motor oil. Plastic labeled with the numbershampoo and motor oil. Plastic labeled with the number
2 is often recycled into toys, piping, plastic lumber and2 is often recycled into toys, piping, plastic lumber and
rope. Like plastic designated number 1, it is widelyrope. Like plastic designated number 1, it is widely
accepted at recycling centersaccepted at recycling centers.

4. Plastics Less CommonlyPlastics Less Commonly
RecycledRecycled
Polyvinyl chloride, commonly used in plastic pipes,Polyvinyl chloride, commonly used in plastic pipes,
shower curtains, medical tubing, vinyl dashboards, andshower curtains, medical tubing, vinyl dashboards, and
even some baby bottle nipples, gets number 3. Likeeven some baby bottle nipples, gets number 3. Like
numbers 4 (wrapping films, grocery and sandwich bags,numbers 4 (wrapping films, grocery and sandwich bags,
and other containers made of low-density polyethylene)and other containers made of low-density polyethylene)
and 5 (polypropylene containers used in Tupperware,and 5 (polypropylene containers used in Tupperware,
among other products), few municipal recycling centersamong other products), few municipal recycling centers
will accept it due to its very low rate of recyclability.will accept it due to its very low rate of recyclability.

5. Another Useful Plastic toAnother Useful Plastic to
RecycleRecycle
Number 6 goes on polystyrene (Styrofoam) items such as
coffee cups, disposable cutlery, meat trays, packing
“peanuts” and insulation. It is widely accepted because it
can be reprocessed into many items, including cassette
tapes and rigid foam insulation.

6. Hardest Plastics to RecycleHardest Plastics to Recycle
Last, but far from least, are items crafted from various
combinations of the aforementioned plastics or from
unique plastic formulations not commonly used. Usually
imprinted with a number 7 or nothing at all, these plastics
are the most difficult to recycle and, as such, are seldom
collected or recycled. More ambitious consumers can feel
free to return such items to the product manufacturers to
avoid contributing to the local waste stream, and instead
put the burden on the makers to recycle or dispose of the
items properly.

7. Hardest Plastics to RecycleHardest Plastics to Recycle
Last, but far from least, are items crafted from various
combinations of the aforementioned plastics or from
unique plastic formulations not commonly used. Usually
imprinted with a number 7 or nothing at all, these plastics
are the most difficult to recycle and, as such, are seldom
collected or recycled. More ambitious consumers can feel
free to return such items to the product manufacturers to
avoid contributing to the local waste stream, and instead
put the burden on the makers to recycle or dispose of the
items properly.